| Serum ovalbumin-specific immunoglobulin G responses during pregnancy reflect maternal intake of dietary egg and relate to the development of allergy in early infancy. | |
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MedLine Citation:
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PMID: 15663559 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The value of allergen elimination diets during pregnancy for primary prevention of infant allergy has been questioned. However, dietary compliance may influence effectiveness. OBJECTIVES: To monitor egg intake during a randomized controlled trial of egg avoidance throughout pregnancy and lactation by serial measurements of serum ovalbumin (OVA) IgG concentration in conjunction with dietary diary record and also, to analyse specific IgG concentrations at birth in relation to infant allergic outcome. METHODS: Pregnant women, with personal or partner atopy, were randomized to complete dietary egg exclusion or an unmodified healthy diet before 20 weeks gestation. The infants were evaluated for atopy at 6 months of age. Serum food-specific IgG concentrations were determined by ELISA in maternal samples collected at study recruitment and during labour, and in infant samples at birth (umbilical cord). RESULTS: Serum-specific IgG to OVA, but not the unrelated allergen, cow's milk beta-lactoglobulin, decreased over pregnancy in egg-avoiding women only (P<0.001). Cord OVA IgG concentration correlated with maternal IgG at delivery (r=0.944; P<0.001), and for infants born to atopic women, cord concentration was higher than that of their mother's (P<0.001). Infants with the lowest and highest cord IgG concentrations were the least likely, and those with mid-range concentrations were the most likely, to be atopic by 6 months of age (P=0.008). CONCLUSION: Serum OVA IgG concentration reflects egg consumption, thereby indicating dietary allergen doses to which the developing immune system might be exposed. Trans-placental maternal IgG must be considered among early life factors that regulate infant atopic programming. |
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Authors:
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G H S Vance; K E C Grimshaw; R Briggs; S A Lewis; M A Mullee; C A Thornton; J O Warner |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology Volume: 34 ISSN: 0954-7894 ISO Abbreviation: Clin. Exp. Allergy Publication Date: 2004 Dec |
Date Detail:
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Created Date: 2005-01-24 Completed Date: 2005-04-12 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8906443 Medline TA: Clin Exp Allergy Country: England |
Other Details:
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Languages: eng Pagination: 1855-61 Citation Subset: IM |
Affiliation:
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Child Health, Infection, Inflammation & Repair Division, Health Care Research Unit, University of Southampton, UK. ghsv@soton.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Animals Chi-Square Distribution Diet* Diet Records Eggs* Enzyme-Linked Immunosorbent Assay / methods Female Fetal Blood / immunology Humans Hypersensitivity / immunology* Immunoglobulin G / blood* Infant Infant, Newborn Lactation Ovalbumin / immunology* Patient Compliance Pregnancy / immunology* Pregnancy Trimester, Second Pregnancy Trimester, Third Prospective Studies |
| Chemical | |
Reg. No./Substance:
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0/Immunoglobulin G; 9006-59-1/Ovalbumin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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